Pump



FIG. 1 is a front perspective view of a pump showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a left elevational view;

FIG. 5 is a right elevational view;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view.

The broken lines are included for the purpose of illustrating portions of the pump that form no part of the claimed design. 

CLAIM The ornamental design for a pump, as shown and described herein. 